Pea hulling machine



Aug. 31, 1943. E. A. HOLMES PEA HULLING MACHINE Filed Oct. 14, 1940 3 Sheets-Sheet 1 son/mm fi. yon/v55,

Aug. 31, 1943.

E. AQHOLMES PEA HULLING MACHINE Filed Oct. 14, 1940 5 Sheets-Sheet 2 EDWAMD 19. 1/04 MES,

Aug. 31, 1943. E. A. HOLMES 2,328,015

. PEA HULLING MACHINE Filed Oct. 14, 1940 3 Sheets-Sheet 5 tow/m0 IIOLMES,

bodying my invention; v V Fig. 2 is a longitudinal vertical crossxsection therethrough; and

epplieationfoeto r 1 peas or blackeeyed peaslpr the like.

The ileld pea has a long, narrow pod or shell. which isjuite tough whenthe pea is green. Various deviceshave beenfutillzed'ior shelling peas, but all themachine's here orhulllng these tofore used'havefbeen ineillcient; bulky; comof large amounts of power? V plicated and expensive, and have requiredfithe Theprirnary object'or'thepr sentinventionis aoh n r shelling enfie d ne s- Another object 01' the-"invention is to provlde a machine of this .type which shells thepeaswithiout" damage thereto; while removing practicallyallthepeas fromthehmlsorpods. I f U i I Adurther object of the inventionis to produce regular shape 36. The'eyllndrica1 walls 30 form a mechanism which lsismall and lightf'and can be operated with alow amount of power.

t V P AHULLING MACHINE 1 mamna sweet Ge l 2 S a m-e6 M H ;glg'g im to .isoqmff This invention relates t5 an appaf tus; and method for shelling podded vegetables, andpara ticularly green {field peas ('alsogknown as cow The machine includes a hulhng-s'ection shown at the; left of Fig. 1 and, a threshin' lor' separating sectionat Wright.

'l'iie' huiling sectio j is'co posed of three 'unitsl Eaeh of these unitsinclude's a drum 22 mounted 3 to turn on ashaft 24, these shafts being carried {by frame members 2, 20-1 and l2',1.respectively.

l Each drama provideaarouna its periphery with projectl-ng ilngers'l-tl fTheseflngersinterfit or al 7 ternate' with fingers fixed on a' cylindricalwall portion 130 concentric with the shaft axis; f The a to" provide a simple and lr gairpensive yet jeflicient lingers and 28 extend, practically to the oppposedsurfaces of the wall portion and drumg re spectlvely, so that beans cannot-s lip through i wlthoutbeingacted on; Thespaceiz between trial thickness ofa beanQso Still another object is toarrange the devioe-in such a way that the parts canbe easilyfcleanedi l If amaware that in prior devices ior hulling various vegetables'cqoperating fixed and; rotating fingers havebeemusedqThe presentfinvention utilizesfisu eh dewtes. (However, the prior er;

rangements have not been satisfactory, since they 7 impart merely a. squeezing action to thepods; and

diillculties in the reedmggcr the pods av been encountered. According to the present invention,"on the eontrarmthe peas are first squeezed by such an arrangement andflare then thrownjby centrifugal force against the teeth of a succeedjlng toothed wheel, whichis rotatingin a direction opposite to that of the travel of the peas.

In this way the squeezed pods are subjected to a beating action whichaids in loosening the peas 1 therefrom. At the same time there is a positive feed from each unit to the next by momentum, so

that dimculties with thepassage of thepeas and hulls through the machine are avoided.

Further obiectsand advantages of this invention will be apparent from the accompanying drawings which form a part thereof.

In the drawings: l

squeezingactlonthereon.

The three drums fl are arranged inan incline d 1 casing having side wallsj fl arjid. a top wallyofilfthegreater partbfthe lower wall ofthis casing. However, time the upperlwalliO-is an extension 38 .formir' ga feedchutef- Also,each of the walls a r 30 terminates at'its'lowei end lna"straight exten-' 1 sion GII'cOnnelctingWith the top of the' next: lower wall. portion w. At the bottom thi's*=whole wall. 0 hasa downwardlyinclineddischargewal1"42. 13 l The cylindrical walls. are hinged at their. t lower ends about pivots; andhare" normally V 2 I held: up by1 nutst46 engaging on bolts. arranged in the casing. This 'permitseasy access to drums I r F13. 1 shows in side elevation a machine em-f Figs- 3, 4 and 5 are cross sectionsionthelines j 3-3, 4-4 and 5-1, respectively, of Fig. 2.

The machine is mounted on a frame composed minute. With a-driim of? six inch radius, this1 means that the peripheral speed of the finger -The driims other end from a. suitable source of power. of, drive might, of course, be

tion, counterclockwise in Fig. 2. V

Th 'arrangement. oi the drums and the lower casing wall constitutes an importantfeature of the invention. It will be noted that the drums are. in stepped relation and that thestraight wall portion at the bottom of each drum isdirec ted The operation of thispart of the mechanism is as followsr The drums are. drivenat a high rateof rotation; from 600 to 800 revolutions per ends isabout 2000 to 2500 feet a minute. Green peas in their hulls are red tothefeedchute s t ,e taapro I g are drivenby pulleys 48 on the out;

side of the casing, these pulleys being connected by belts 50. The upper shaft 22 carries on its! 2 a pulley 52 which is'driven by a belt 54" I Any other type employed. The t drums, however. are all. driven int-he same 'dire'c 1 formed by wall 38,- and fall onto the upper drum.

The fingers 26 engage the peas and draw them between the fixed fingers 28, thus bending and squeezing the hulls, This tends to open the hulls and, tosome degree, to strip the peas therefrom,

;When the peas have passed through the fixed fingers, theyreachthe end of thecylindrical wall 30 and come to the straight guiding wall 40. The

peas are moving at a high velocity; and because of centrifugal force :they, travel away irom the drum fingers in -"the s direction; otthe; arrow '56 (Fig. 2) and are'thrown against thefingers of the next lower or intermediate drum. These fingers are moving counterclockwise, or in the" opposite direction to the'movement ofjthehullS;

so that the relative speed of impact isincreasedh v Thus the hulls are subjected to a severebeating action-which tends to removethe: peas -mOIf-Gf thoroughly from'the hulls without, howeverg doing any damage to the peas. f V I V Itz wi-lil be; noted thatfthe drums and fingersare entirely independent; and ido not overlap ifififih other, each acting as a separate;squeezing unit,

but 'cooperating -with the next-,unitwto-iexert a 1 beatingsactiont All rotate in the same direction,

loutare so staggered and encased that the;.- -p eas leavingtheperiphery'oi one drum-encounter an oppositelyimovi-ng "portion ofithesnext lewer one.

Inthespecific construction shown-,this is accomplished -by;;arr-angingthe drums in an inclined series which-slopes downward the direction ofrgthe :movement of the 1 lower portions of h the After theubeating action above describedtthe -peas-ware; squeezed agaimby-the-intermediate a andgagain, thrown. against the lower; drum and beaten-thereby. 2 They aresthen fed-i'from the lower drum to the separating-mechanism new to :This partof the device includes an l i wardly i i-nclined 'trcugh jof. suitable length 'havingj-side wallsftflzbetweenz w-hich is arrangedvafplate'iz having perforations 64 therein through whioh'the :beanscanpass. The troughlis-mounted for} re- 1 oiprocatingmovementbetween the frame:;mem;-

hers [6r ifl 'by pivoted links 66. Belowzscreen ,62

is-atrough-like bottom 68;:for catchingthe peas, openi g-ataitslowerendzintoa transversein- :clined discharge spout'lll. 1 i f Therhullsi are fed by. wall 42 :into the lower endiof 'thertrough; They are carriedrup along the a trough by rakes "72' carried: by; endless chains M.

' Chains 14 are mountedon 'sprccketsflfionshafts u -and also run over. idler rolls .80. ;T he ;inner zand lower sha-f-ts 18 is-driven= by -sprocketiM-and I chain 84 drum shaft 22.. 7 V I Reciprocating motion is imparted to the trough by a pitman 88'engaging an eccentric 99 on shaft -92 carried by frame member 14, This shaft is driven by a pulley 94 on shaft '18. a V i e j Gperation of thehulling unit, therefore, both and belt 95 from pulley 98 drives the rakes and'shakes the trough. As the b l a e d essed up ,i11e,.troueh, i Pea-S P- w arate therefrom and fallQthrough-the screen to the discharge spout. The hulls iall'over the end of the trough and may be disposed ofin any suitable manner. a 1 i 1 v i l fjThe machine thus described operates at a high rate of speed ,to remove practically all the peas fromthehulls-withoutdamage thereto, 7 t wheel have described herein one embodiment of my invention, I wish it to be known that I do not-intend to limitmyself thereby, except within the scope or" the appended claims. 7

' 1. In ai ea hullingimchine fa flpair oftdrurn s each havinglteeth ektendinglhfefrorn, stationary partly lcylindrical ewalls'gconcentric with said drums, teeth onisaid wallsint'erflttingjwith the teeth. on said, drums, means ,to drive Jsaid drums in. the same J direction, 7 rneansf mounting said drums with theinaxes in. a( line dowriw''ajdlyv inclined in the "direction of thefn'ioveinent of ,the lowersides of the drumsithe tangent tQthe-partly cylindrical wall vopposite the upper. drum attlie end of rthejcylindrical part. thereof intersecting 7 the teethlof .thel'rrext lowerpdrum at afpoint where said teeth are moving towards the, upper;

whereby'peas leaving the teethlof the u per dri rn are thrown against the teeth. of the lower. drum in a direction opposite tothe direction 'of rnovew ment thereof. f

lniagpea hulling machina a pair ofzharallel toothedcylinderslarranged to act suocessively'on i the peas, the axes of Saidcylinders being spaced apart suchr a distance thatthe .path of lthejteeth of. said cylinders are iadjacent tbutnot intersecting; each of said cylinders le eing providedwith a concave'; having a curved. wall, said, .concaves" having teeth'thereon, the curved wall of the conwhichis substantiallytangentqtothe base of the KEDTWAPVDA. rioLMEsf from a sprocket 86 on intermediate 

